AssetManager can load blueprints of the wrong type when redirectors exist

UE - Gameplay - Sep 29, 2017

The logic in the AssetManager to determine if a scanned Blueprint should be added to the primary asset directory is wrong if that blueprint has an active redirect targeting it. The simplest way to r ...

Reading LightAttenuationTexture Produces Unexpected Results With Forward Rendering

UE - Graphics Features - Jul 5, 2018

The expected behavior occurs in 4.19; unexpected behavior occurs in 4.20 and 4.21. Marking this as a regression. Per User: Reading the LightAttenuationTexture in a material receives interference ...

Post Process Material + Stereo Rendering = Left Eye Black

UE - Platform - XR - Dec 16, 2019

Left Eye Renders black in VR when a PostProcess Material is applied. On Quest Right eye renders post process mat and left eye renders scene, but upsidedown. Also occurs in Packaged Project and/or ...

Use mouse for touch enables gesture action on button which makes the button to lost focus to that the button fires onreleased event

UE - Editor - UI Systems - Slate - Mar 20, 2019

When Use mouse for touch is enabled, the button fires onreleased event. Here is what I investigated. Use mouse for touch enables gesture action in the button that leads to LongPress gesture fires ...

Crash if the setting of PhysicalAnimationComponent is changed in the same frame as teleport processing

UE - Simulation - Physics - Apr 24, 2020

Crash when ApplyPhysicalAnimationProfileBelow node and UPhysicalAnimationComponent :: UpdateTargetActors by UPhysicalAnimationComponent :: OnTeleport run in the same frame. Because RuntimeInstanceDa ...

Remove reference to editor assets in cooked build from landscape visibility layer

UE - LD & Modeling - Terrain - Landscape - May 21, 2020

As soon as the visibility tool is used, we're adding references to the  "/Engine/EditorLandscapeResources/DataLayer" asset from landscape components. If the user decides to cook without editor data ...

AttachComponentToComponent node does not change the location of a Spawned particle system at runtime

UE - Framework - Components - Feb 17, 2022

You can use the "Spawn Emitter Attached" function as a work around ...

OnObjectPropertyChanged Firing Excessively when FText is Bulk Edited

UE - Editor - Verse Class Editor - Jun 28, 2023

If multiple game objects are selected at once and their text field is edited, instead of getting N events, it produces N-squared events. It looks like FPropertyHandleBase::SetPerObjectValue is call ...

GameplayEffects: Inherited UAssetTags and UTargetTags do not update their referenced tags correctly with inheritance

UE - Gameplay - Jan 25, 2024

When inherited, it is reasonable to expect the tags added by the parent to be reflected in the children. If the parent is editted after the children, however, tags that are added or deleted are not ...

Screenspace Denoiser creates artifacts for Ray Traced Shadows

UE - Rendering - Graphics Features - Ray Tracing - Nov 13, 2023

Screen space denoiser creates two types of artifacts: artifacts around boundary for general lighting The artifact is there before 5.2 but since the ray traced shadow denoiser denoises on the sqr() s ...